diff --git a/CMakeLists.txt b/CMakeLists.txt
index f55cb91..7f6ce4d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,7 @@ set(CMAKE_CXX_EXTENSIONS ON)
 #target_link_libraries(support PUBLIC -lh2o-evloop -lssl -lcrypto Threads::Threads)
 
 add_executable(teller teller.cc )
-target_link_libraries(teller -lpcaudio)
+target_link_libraries(teller -lpcaudio -lpthread)
 
 #enable_testing()
 #add_test(testname testrunner)